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@eine tstrs @anni @frn IMPROVEMENT IN SAWING MACHINES.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, J. B. SWE-ETLAND, of Pontiac, in the county of Oakland, and State of Michigan, have invented certain new and useful improvements in Combined Drag and Circular Sawing Machine; and do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of. reference marked thereon. In the annexed drawings, making part ofthis specification I A represents the frame ofthe machine, which consists of four uprights which cross each other in pairs, said pairs being separated from each other a suitable distance. This frame resembles the ordinary saw-buck, only it is made larger. B B represent cross-bars, which are secured upon the ends of the frame, and which are v provided with suitable journal-boxes for a shaft, C, which runs from one cross-piece to the other. This shaft, eC, is provided with a pinion, V, a fixed pulley or groovcd drum, E, an eccentrically anged wheel, J", and a balance-wheel, X. A gear-wheel, works into the pinion V, and serves to give motion to the machine; said geur-wheel being securedupon one en'd of a shaft, which -passes from one end to the other of the frame A. F represents a rocking or oscillating carriage, which carries the circular saw H. This carriage straddles the pulley E, having its lower ends formed so as to fit over and embrace the shaft C. The upper end of this carria-ge is made forked, and through these forks a short shaft passes, upon which is secured a pulley, G, and the circular saw II. A band passes from pulley E to and around pulley G, and serves to communicate motion to the saw. By connecting the saw-shaft to the shaft C, by means of the carriage F, which moves in a concentric circle with the pulley E, the saw may be partially revolved (or entirely) around the shaft C without aifecting the tension of the belt which connects the two pulleys'E and G. Between the forks at the upper end of the frame A is formed a trough, D, which has a slot cut crosswise of it in its bottom to allow the-circular saw to cut any material which is placed in said trough, the saw passing into said slot. A rod, I, is connected to the carriage F for the purpose of drawing it up or moving it away from its work.

Y represents a pitman, one end of'iwhich is connected to a piu on one of the arms of the driving or balancewheel X, the other end of said pitman being connected to thc drag-saw bar Z. The bar Z has a slot or opening cut in one end to enable it to straddle the shaft C, thus forming a guide for it. rllhe other end of bar Z is supported between two anges in a sliding box, d. The box d slides upon a curved standard, O, which is erected upon the platform of the frame A. The curve of the standard O is concentric with that of the balance-wheel X, so that the bar d may slide from one end to the other of said standard while it is at work. The drag-saw is attached to the saw-bar Z. The wheel .I has formed upon one face of it a series of eccentric flanges, a, a, which are separated from each other at their ends. Upon the shaft L is secured a pinion, K, the teeth of which are caught in the flanges of wheel J as it revolves, and is thus made to revolve. The outer end of each flange is further from the centre of the wheel J than the inner end, and the inner end catching in between the teeth of wheel K, said wheel is made to revolve partially around, as the ilange runs through to its outer end. The flanges catch` between the teeth in succession, and thus"- canse the wheel K with its shaft L to revolve. The shaft L lies orosswise of the frame, having a hearing for one end in a piece secured upon the frame and passing through a horizontal slot in a similar piece secured upon the other side of said frame.

M represents a conncctingbar or shaft, which connectsthe end of the shaft of a grooved roller, N, to the end of the shaft L. The ends of shaft M may be connected to the ends of the other shaft'by toggle or other joints, or any suitable coupling.

P represents a lever, the lower end of which is pivoted or hinged to the platform of the frame, and which is connected to the sliding box d by means of a cord, S, which runs through a pulley in an adjusting-bar, T. By bearing down the lever P the box d is raised on the standard O. The lever P is provided with a pin, q, on one side, which, when the said lever is borne, down catches over the shaft M, and drawing it toward said lever throws the'wheel K upon shaft L into gear with the wheel J; this causes the roller N to revolve, and the end of the piece of timber to be sawed, resting upon said roller, is moved endwise in proper position for being cut in two parts. As soon as the timber is brought to the proper point where it is desired to out it the lever P is raised, which drops the saw upbn the timber, and at the same time releases the shaft M, and said shaft is thrown back `by a spring, e, so als to throw the wheel K out of gear and stop the movement of the wheel N with its timber. The slotted bar T serves tostation and adjust the upper end of standard O at its proper position.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is- The arrangement of lever P With the cord S, hoX d, and pin q, and shaft M, for raising the saw and throwing the roller in gear to move the timber at the same operation, substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 5th day of March, 1867.

J. B. SWEETLAND.

Witnesses:

J. TEN EYCK, W. L. BAINES. 

